Reverted PhpStorms auto conversion of array declarations to shorthand…

…. This is because this package still supports PHP v5.3

src/HelpScoutApp/DynamicApp.php

@@ -137,6 +137,6 @@ public function getResponse($html) {
 		if (is_array($html)) {
 			$html = implode('', $html);
 		}
-		return json_encode(['html' => $html]);
+		return json_encode(array('html' => $html));
 	}
 }